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      • KCI등재

        Adsorption and photocatalytic degradation of cationic dyes over bismuth ferrite (BFO) intercalated on liquid natural rubber-based hydrogel compound

        Mhonishya Krishnamoorthy,Mohamad Azuwa Mohamed,Noor Haida Mohd Kaus,Siti Fairus M. Yusoff 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-

        A hydrogel-based photocatalyst was employed to remove methylene blue (MB) and safranin dye effluentsfrom wastewater using a liquid natural rubber (LNR)-acrylic acid (AAc) based bismuth ferrite (BFO)hydrogel compound. Response Surface Methodology (RSM) was used in this research to optimize severalparameters for the synthesis of hydrogel compound and adsorptive-photodegradation process. Without apost-treatment separation phase, safranin and MB dye were able to maintain dye removal for up to sixand five cycles with 99% dye removal, respectively, explaining the hydrogel’s stability and adsorptive efficiency. Furthermore, MB and safranin dyes were adsorbed and photodegraded very rapidly under a xenonlamp compared to the dye removal efficacy at dark, proving BFO has aided in the photodegradation processadsorbs further the dye effluents in which the hydroxyl radical (·OH) and superoxide radical (·O2 – )species were responsible for the photocatalytic activity. It has been proposed that safranin and MB dyeeffluent adsorption matches the pseudo-second-order kinetic model and Freundlich isotherm model. Apositive entropy number, S, in thermodynamic analysis indicates that the reaction has become more random,boosting the system’s spontaneity. Meanwhile, it is found that adsorption rate of safranin is highlydependent on pH and is under the influence of inner sphere surface complexes. Thus, the synthesizedLNR-g-MaH/AAc-BFO hydrogel compound in this study has shown excellent performance in the removalof dye effluents for the wastewater treatment process with enhanced stability.

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